<template>
    <div>
          <!-- 面包屑导航 -->
          <el-breadcrumb separator-class="el-icon-arrow-right">
  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
  <el-breadcrumb-item>权限管理</el-breadcrumb-item>
  <el-breadcrumb-item>角色列表</el-breadcrumb-item>
</el-breadcrumb>


<!-- 卡片角色 -->
<el-card>

    <el-row>
        <el-col>
            <el-button type="primary">添加角色</el-button>
        </el-col>
    </el-row>

<!-- 角色列表区域 -->

<el-table :data="rolelist" border stripe>
  <!-- 展开列 -->
    <el-table-column type="expand">
        <template slot-scope="scope">

            <el-row  :class="['bdbottom',i1 ===0? 'bdtop': '', 'vcenter']"  v-for="(item1, i1) in scope.row.children" :key="item1.id" >
                <!-- 渲染一级权限 -->
                <el-col :span="5">
                   <el-tag closable  @close="removeRightById(scope.row,item1.id)"> {{ item1.authName }}</el-tag>
                   <i class="el-icon-caret-right"></i>
                </el-col>
                <!-- 渲染二级和三级权限 -->
                <el-col :span="19">
                    <!-- 通过for循环嵌套渲染二级权限 -->
                    <el-row :class="[i2 ===0?'':'bdtop' , 'vcenter']" v-for="(item2, i2) in  item1.children" :key="item2.id">
                        <el-col :span="6">
                            <el-tag  type="success" closable @close="removeRightById(scope.row,item2.id)"> {{ item2.authName }}</el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>

                        <el-col :span="18">
                            <el-tag type="warning" :class="[item3, i3]" v-for="(item3, i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                                {{ item3.authName }}

                            </el-tag>
                        </el-col>
                    </el-row>
                </el-col>
            </el-row>
            <pre>
                <!-- {{ scope.row }} -->
            </pre>

        </template>
    </el-table-column>
  <!-- 索引列 -->
    <el-table-column type="index"></el-table-column>
    <el-table-column label="角色名称" prop="roleName"></el-table-column>
    <el-table-column label="角色描述" prop="roleDesc"></el-table-column>

    <el-table-column label="操作">
    <template slot-scope="scope">
        <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
        <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
        <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog (scope.row)" >分配权限</el-button>
    </template>
</el-table-column>
</el-table>

</el-card>

<!-- 分配权限的对话款 -->
<el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%"
  @close="setRightDialogClosed">
 <!-- 树形控件 -->
 <el-tree :data="rightslist" :props="treeProps"  show-checkbox node-key="id"
 default-expand-all :default-checked-keys="defkeys" ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>


    </div>
</template>

<script>
export default {
    data(){
        return{
            rolelist:[],
            //分配对话款的显示和隐藏
            setRightDialogVisible: false,
            
            //所有权限的数据
            rightslist:[],
            //树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            //默认选中的id值数组
            defkeys:[],
            //当前即将分配权限的角色id
            roleId:''
        }
    },
    created(){
        this.getRolesList()
    },
    methods:{
       async getRolesList(){
        const {data:res}= await this.$http.get('roles') 

        if(res.meta.status !==200){
            return this.$message.error('获取角色列表失败')
        }
        
        this.rolelist =res.data
        console.log(this.rolelist)
        },

        //根据ID删除对应的权限
      async  removeRightById(role ,rightId){
            //弹框提示是否删除
       const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err =>err)

        if(confirmResult !=='confirm'){
            return this.$message.info('取消删除')
        }
       const {data:res}=await   this.$http.delete(`roles/${role.id}/rights/${rightId}`)
       if(res.meta.status !=200){
        return this.$message.error('删除权限失败')
       }
    //    this.getRolesList()
    role.children = res.data

        },
        //展示分配处理的对话框
       async showSetRightDialog(role){
            this.roleId = role.id
            //获取所有权限数据 
          const{data:res} =await this.$http.get('rights/tree')
          if(res.meta.status !==200){
            return this.$message.err('获取数据失败')
          }
          //把获取到的数据保存到data
          this.rightslist =res.data
          console.log(this.rightslist)

          //递归获取三级节点的id
          this.getLeafKeys(role, this.defkeys)
            this.setRightDialogVisible = true
        },

        //通过递归的形式，获取角色下的所有三级权的id，并保存到defkeys
        getLeafKeys(node, arr) {
      // 如果当前 node 节点不包含 children 属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },


    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )

      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }

      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
    }
}
</script>

<style lang="less" scoped>
    .el-tag{
        margin: 7px;
    }

    .bdtop{
        border-top: 10px solid #eee;
    }

    .bdbottom{
        border-bottom: 1px solid #eee;
    }
</style>
